The best products typically show xylitol it at the start of their ingredient list.

Types of products will vary but generally look for xylitol listed up front. Also, be wary if you see cheaper, less-effective sugarless sweeteners shown too. Here's how to evaluate an ingredient list...

The cost of granular xylitol, even when bought in bulk, can be 5 to 10 times of cost of table sugar. But the daily amount you need to prevent cavities is so small that it's actually still a great bargain.